Styrene-butadiene roba (SBR) bụ rọba sịntetịt nke a na-ejikarị eme ihe na enwere ike imepụta ya site na copolymerization nke butadiene (75%) na styrene (25%) site na iji ndị na-amalite radical free.A na-enweta copolymer na-enweghị usoro.Microstructure nke polymer bụ 60%-68% trans, 14%-19% cis, na 17%-21% 1,2-.A na-ejikarị ụzọ mmiri eme ihe iji mara polybutadiene polymers na copolymers.NMR steeti siri ike na-enye ụzọ dabara adaba iji chọpụta microstructure polymer.
Ugbu a, a na-emepụta SBR karịa site na ijikọta monomers abụọ na anionic ma ọ bụ nhazi nhazi.Copolymer a kpụrụ akpụ nwere ihe arụrụ arụ ka mma yana nkesa arọ molekụla dị warara.Enwere ike ịme copolymer na-enweghị usoro nke nwere usoro iwu na ngwọta site na iji butyl-lithium, ma ọ bụrụhaala na ejiri nwayọọ na-ana monomers abụọ ahụ.Enwere ike ịmepụta copolymers nke butadiene na styrene na ngwọta site na iji nhazi ma ọ bụ ihe na-akpali akpali.Butadiene na-ebu ụzọ mee ihe ruo mgbe a ga-erepịa ya, mgbe ahụ styrene na-amalite ime polymerize.SBR emepụtara site na nhazi nhazi nwere ike tensile dị mma karịa nke ndị mmalite radical na-emepụta.
Isi ojiji nke SBR bụ maka mmepụta taya.Ojiji ndị ọzọ gụnyere akpụkpọ ụkwụ, mkpuchi, nkwado kapeeti, na nrapado.
Njirimara
Nguzogide iyi, nkwụsị ịka nká, nkwụsị mmiri na ikuku ikuku dị mma karịa roba eke, ebe adhesion, elasticity na deformation calorific values dị ala karịa roba eke.Styren butadiene roba nwere ezigbo ihe mejupụtara ya.Ọ bụ ụdị rọba sịntetịt kacha ukwuu, ihe ọ na-arụpụta bụ 60% nke rọba sịntetịt.Ihe dị ka 87% nke ikike imepụta rọba styrene butadiene n'ụwa na-eji emulsion polymerization.N'ikwu okwu n'ozuzu, rọba styrene butadiene na-ezo aka na emulsion polymerized styrene butadiene rọba.Emulsion polymerized styrene butadiene roba tinyekwara elu okpomọkụ emulsion polymerization nke butadiene styrene na obere okpomọkụ emulsion polymerization nke oyi butadiene.
Jiri
A na-eji ya eme roba sponge, eriri na akwa na akwa akwa, nke a na-ejikwa dị ka nrapado, mkpuchi wdg.
Oge nzipu: Mar-10-2022